Multielectron-Ion Coincidence Spectroscopy of Xe in Extreme Ultraviolet Laser Fields: Nonlinear Multiple Ionization via Double Core-Hole States

M. Fushitani, Y. Sasaki, A. Matsuda, H. Fujise, Y. Kawabe, K. Hashigaya, S. Owada, T. Togashi, K. Nakajima, M. Yabashi, Y. Hikosaka, and A. Hishikawa
Phys. Rev. Lett. 124, 193201 – Published 12 May 2020
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Abstract

Ultrafast multiphoton ionization of Xe in strong extreme ultraviolet free-electron laser (FEL) fields (91 eV, 30 fs, 1.6×1012W/cm2) has been investigated by multielectron-ion coincidence spectroscopy. The electron spectra recorded in coincidence with Xe4+ show characteristic features associated with two-photon absorption to the 4d2 double core-hole (DCH) states and subsequent Auger decay. It is found that the pathway via the DCH states, which has eluded clear identification in previous studies, makes a large contribution to the multiple ionization, despite the long FEL pulse duration compared with the lifetime of the 4d core-hole states.

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  • Received 17 December 2019
  • Accepted 14 April 2020

DOI:https://doi.org/10.1103/PhysRevLett.124.193201

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

M. Fushitani1,2, Y. Sasaki1, A. Matsuda1,2, H. Fujise1,2, Y. Kawabe1, K. Hashigaya1, S. Owada2,3, T. Togashi2,3, K. Nakajima2,3, M. Yabashi2,3, Y. Hikosaka4,2, and A. Hishikawa1,5,2,*

  • 1Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
  • 2RIKEN, SPring-8 Center, Sayo, Hyogo 679-5148, Japan
  • 3Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
  • 4Institute of Liberal Arts and Sciences, University of Toyama, Toyama 930-0194, Japan
  • 5Research Center for Materials Science, Nagoya University, Nagoya, Aichi 464-8602, Japan

  • *hishi@chem.nagoya-u.ac.jp

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Issue

Vol. 124, Iss. 19 — 15 May 2020

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